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#include <string.h>
#include <krb5_locl.h>
#include <hdb.h>
#include <hx509.h>
#include <kdc.h>
#include <windc_plugin.h>
static krb5_error_code KRB5_CALLCONV
windc_init(krb5_context context, void **ctx)
{
krb5_warnx(context, "windc init");
*ctx = NULL;
return 0;
}
static void KRB5_CALLCONV
windc_fini(void *ctx)
{
}
static krb5_error_code KRB5_CALLCONV
pac_generate(void *ctx, krb5_context context,
struct hdb_entry_ex *client,
struct hdb_entry_ex *server,
const krb5_keyblock *pk_replykey,
uint64_t pac_attributes,
krb5_pac *pac)
{
krb5_error_code ret;
krb5_data data;
if ((pac_attributes & (KRB5_PAC_WAS_REQUESTED |
KRB5_PAC_WAS_GIVEN_IMPLICITLY)) == 0) {
*pac = NULL;
return 0;
}
krb5_warnx(context, "pac generate");
data.data = "\x00\x01";
data.length = 2;
ret = krb5_pac_init(context, pac);
if (ret)
return ret;
ret = krb5_pac_add_buffer(context, *pac, 1, &data);
if (ret)
return ret;
return 0;
}
static krb5_error_code KRB5_CALLCONV
pac_verify(void *ctx, krb5_context context,
const krb5_principal new_ticket_client,
const krb5_principal delegation_proxy,
struct hdb_entry_ex * client,
struct hdb_entry_ex * server,
struct hdb_entry_ex * krbtgt,
krb5_pac *pac)
{
krb5_error_code ret;
krb5_data data;
krb5_cksumtype cstype;
uint16_t rodc_id;
krb5_enctype etype;
Key *key;
krb5_warnx(context, "pac_verify");
ret = krb5_pac_get_buffer(context, *pac, 1, &data);
if (ret)
return ret;
krb5_data_free(&data);
ret = krb5_pac_get_kdc_checksum_info(context, *pac, &cstype, &rodc_id);
if (ret)
return ret;
if (rodc_id == 0 || rodc_id != krbtgt->entry.kvno >> 16) {
krb5_warnx(context, "Wrong RODCIdentifier");
return EINVAL;
}
ret = krb5_cksumtype_to_enctype(context, cstype, &etype);
if (ret)
return ret;
ret = hdb_enctype2key(context, &krbtgt->entry, NULL, etype, &key);
if (ret)
return ret;
return krb5_pac_verify(context, *pac, 0, NULL, NULL, &key->key);
}
static void logit(const char *what, astgs_request_t r)
{
krb5_warnx(r->context, "%s: client %s server %s",
what,
r->cname ? r->cname : "<unknown>",
r->sname ? r->sname : "<unknown>");
}
static krb5_error_code KRB5_CALLCONV
client_access(void *ctx, astgs_request_t r)
{
logit("client_access", r);
return 0;
}
static krb5_error_code KRB5_CALLCONV
finalize_reply(void *ctx, astgs_request_t r)
{
logit("finalize_reply", r);
return 0;
}
static krb5plugin_windc_ftable windc = {
KRB5_WINDC_PLUGING_MINOR,
windc_init,
windc_fini,
pac_generate,
pac_verify,
client_access,
finalize_reply
};
static const krb5plugin_windc_ftable *const windc_plugins[] = {
&windc
};
krb5_error_code KRB5_CALLCONV
windc_plugin_load(krb5_context context,
krb5_get_instance_func_t *get_instance,
size_t *num_plugins,
const krb5plugin_windc_ftable *const **plugins);
static uintptr_t KRB5_CALLCONV
windc_get_instance(const char *libname)
{
if (strcmp(libname, "hdb") == 0)
return hdb_get_instance(libname);
else if (strcmp(libname, "krb5") == 0)
return krb5_get_instance(libname);
return 0;
}
krb5_error_code KRB5_CALLCONV
windc_plugin_load(krb5_context context,
krb5_get_instance_func_t *get_instance,
size_t *num_plugins,
const krb5plugin_windc_ftable *const **plugins)
{
*get_instance = windc_get_instance;
*num_plugins = sizeof(windc_plugins) / sizeof(windc_plugins[0]);
*plugins = windc_plugins;
return 0;
}
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